// Installed Timers slaved off of the guest monotonic TSC
uint_t num_timers;
struct list_head timers;
+
+ // Installed timeout handlers, and the time (in monotonic guest time) of hte
+ // next timeout.
+ uint64_t next_timeout;
+ struct list_head timeout_hooks;
};
struct v3_timer_ops {
void * private_data;
struct v3_timer_ops * ops;
+ // Need to add accuracy/resolution fields later.
+
struct list_head timer_link;
};
+typedef void (*v3_timeout_callback_t)(struct guest_info * info, void * priv_data);
+struct v3_timeout_hook {
+ void * private_data;
+ v3_timeout_callback_t callback;
+
+ struct list_head hook_link;
+};
+
// Basic functions for handling passage of time in palacios
void v3_init_time_core(struct guest_info * core);
int v3_init_time_vm(struct v3_vm_info * vm);
int v3_adjust_time(struct guest_info * core);
int v3_offset_time(struct guest_info * core, sint64_t offset);
-// Basic functions for attaching timers to the passage of time
+// Basic functions for attaching timers to the passage of time - these timers
+// should eventually specify their accuracy and resolution.
struct v3_timer * v3_add_timer(struct guest_info * info, struct v3_timer_ops * ops, void * private_data);
int v3_remove_timer(struct guest_info * info, struct v3_timer * timer);
void v3_update_timers(struct guest_info * info);
+// Functions for handling one-shot timeouts in Palacios. Note that only one
+// timeout is every currently outstanding (the soonest scheduled one!), and that
+// all hooks are called on any timeout. If a hook gets called before the desired
+// timeout time, that hook should reschedule its own timeout if desired.
+struct v3_timeout_hook * v3_add_timeout_hook(struct guest_info * info, v3_timeout_callback_t callback, void * priv_data);
+int v3_remove_timeout_hook(struct guest_info * info, struct v3_timeout_hook * hook);
+int v3_schedule_timeout(struct guest_info * info, ullong_t cycles);
+int v3_check_timeout(struct guest_info * info);
+
// Functions to return the different notions of time in Palacios.
static inline uint64_t v3_get_host_time(struct vm_time *t) {
uint64_t tmp;